D. L. SHANKLES

Oil · District 09 · Lease #31194

Operator: WHITE MARLIN OPERATING CO, LLC

Fields: PERRIN, N. AFB (BAKER SD)

Cum Oil

44k BBL

Cum Gas

47k MCF

casinghead

Wells

2

Production

2006-04 — 2026-04

Peak Month

2006-05

Production History

Cum Oil: 44,233 BBL Cum Gas: 47,170 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

359 BBL/mo

Di (annual)

9.5%

b-factor

0.0

EUR

44,843 BBL

R-squared

0.468

type

exponential

Operator History (from monthly production reports)

2018-09 — 2026-07 BKM PRODUCTION 95 mo

2018-04 — 2018-08 WHITE MARLIN OPERATING CO, LLC 5 mo

2014-10 — 2018-03 ARROW ROCK ENERGY, LLC 42 mo

2006-04 — 2014-09 SAMSON LONE STAR, LLC 102 mo

Wells (2)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
1	42-181-30951	BKM PRODUCTION	3	12,800	2010-06-30
2	42-181-31046	BKM PRODUCTION	3	12,000	2008-09-26